Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a0edeccae213a2…

MALICIOUS

PDF

78.5 KB Created: 2021-09-21 18:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f3d0a155d298403046de0c471d16dba8 SHA-1: 178e8550bb13bc325ed6fc13fe2baae83c79f468 SHA-256: 06a0edeccae213a2e2ac4c62ec6f0279164b8d5bf2bee915453f4c81a287757d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to obscure the ultimate destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://laborke.ru/uplcv?utm_term=hill+racing+2+hack
    • http://taiwan-casters.com/userfiles/file/67089865707.pdf
    • https://trisyscom.com/userfiles/file/fojeji.pdf
    • http://sibzakon.ru/ckfinder/userfiles/files/junifo.pdf
    • http://csp.hu/editor_up/puwib.pdf
    • https://1000families.eu/userfiles/file/zegolorufula.pdf
    • http://footstepfloor.com/upfiles/files/kexoritumezene.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142a4fd3a992---xaranefoxibafusuwizidivo.pdf
    • http://aviapartner.biz/js/ckfinder/userfiles/files/tikiregumunagegokuvo.pdf
    • https://olympicwroclaw.pl/zdjecia/fck/file/19291801005.pdf
    • http://decom.pro/admin/ckfinder/userfiles/files/bevadokemofezitupejogir.pdf
    • http://allaboutdowney.com/userimages/nupofabigikulopedejixa.pdf
    • https://nieruchomosciturystyczne.eu/files/file/duzume.pdf
    • http://totoquynhhuong.com/upload/files/vuxoweguzub.pdf
    • http://honeystraw.com/uploadfiles/file/fofowo.pdf
    • http://hotstamping.pl/files/file/89878761776.pdf
    • http://etcpremium.com/userfiles/files/81775701721.pdf
    • http://vswet.ru/f/muduvifubedig.pdf
    • http://esenkardeslerinsaat.com/resimlerfiles/tawijukekezemub.pdf
    • http://lawfirm.vn/MINH/user_files/file/megiziz.pdf
    • http://dok-vo.ru/userfiles/file/sufusawewiguxisenikawi.pdf
    • https://ev-owners.jp/userfiles/files/38498716206.pdf
    • https://rsun.pro/admin/ckfinder/userfiles/files/gebidukukewol.pdf
    • http://mygiftltd.com/userfiles/file/40223925124.pdf
    • https://shidoremicrosys.com/media/risamugesogogel.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16140653b1fa64---sarumuvuvusijojis.pdf
    • https://easyown.ddproperty.com/datas/files/kosoxifizigifibi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0db.bin
b51c94347ad8a11387177d69e1ba2e8d58f8b479895f819f926fe11d9ff2ae3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DB 10192 bytes
font_01_sfnt_off0000e792.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE792 16792 bytes
font_02_sfnt_off0000ffa4.bin
a1ef32fbdccacea6ea84fdfbed7f0d6377f5844ea4b5afc3c31c1cb441a52de0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA4 17340 bytes

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